SLM forming device for multiple metal powder materials

Patent metadata

Field	Value
Publication number	US-2018154480-A1
Application number	US-201715832788-A
Country	US
Kind code	A1
Filing date	Dec 6, 2017
Priority date	Dec 7, 2016
Publication date	Jun 7, 2018
Grant date	—

Abstract

The invention discloses a Selective Laser Melting forming device for multiple metal powder materials. Technical solutions adopted are as follows: a collector container, a build cylinder and a feed container are provided on a lower portion of a process chamber; leveling oil cylinders for the substrate are mounted in the build cylinder; a recoater bracket in the process chamber is slidably mounted on a slide rail; a recoater is fixed on a lower portion of the recoater bracket; a compaction roller is simultaneously mounted on the recoater bracket; a stress sensor is provided under the compaction roller; an electron microscope for collecting the porosity of the spread powder and the product and a melting pool monitoring Charge Coupled Device camera; a laser scanning system, a directional heating laser system and an alarm device are provided on a top portion of the process chamber.

First claim

What is claimed is:

1 . A Selective Laser Melting forming device for multiple metal powder materials, wherein comprising: a process chamber ( 1 ), wherein a collector container ( 16 ), a build cylinder ( 17 ) and a feed container ( 19 ) are provided on a lower portion of the process chamber ( 1 ); the build cylinder ( 17 ) is provided between the collector container ( 16 ) and the feed container ( 19 ); lifting devices are respectively provided in the collector container ( 16 ), the build cylinder ( 17 ) and the feed container ( 19 ); material pushing bottom plates ( 41 ) are respectively provided on the lifting devices; heating devices ( 35 ) and insulating layers ( 36 ) are respectively provided out of the collector container ( 16 ), the build cylinder ( 17 ) and the feed container ( 19 ); a substrate ( 39 ) is provided on a bottom plate of the build cylinder ( 17 ); leveling oil cylinders ( 40 ) are mounted between the bottom plate and the substrate ( 39 );
a slide rail ( 31 ) is provided on a middle portion of the process chamber ( 1 ); a recoater bracket ( 21 ) is slidably mounted on the slide rail ( 31 ); the recoater bracket ( 21 ) is connected with a motor ( 14 ) via a belt ( 15 ); a recoater ( 20 ) is fixed on a lower portion of the recoater bracket ( 21 ); a roller frame ( 24 ) is hinged to the recoater bracket ( 21 ); a compaction roller ( 26 ) is mounted on the roller frame ( 24 ); torsional springs are respectively provided at two sides of the roller frame ( 24 ); a stress sensor ( 23 ) is provided under the compaction, roller ( 26 ); one side of an upper portion of the process chamber ( 1 ) is provided with an electron microscope ( 4 ) for collecting a porosity of spread powder and a product, and the other side of the upper portion of the process chamber ( 1 ) is provided with a high-precision melting pool monitoring Charge Coupled Device camera ( 9 ); Light-Emitting Diode lamps ( 5 ) are provided between the electron microscope ( 4 ) and the CCD camera ( 9 ); a laser scanning system ( 6 ), a directional heating laser system ( 7 ) and an alarm device ( 8 ) are provided on a top portion of the process chamber ( 1 ); an air intake and exhaust device is provided on a rear wall of the process chamber ( 1 ); a master control system ( 13 ) is provided on a sidewall of the process chamber ( 1 ).

2 . The SLM forming device for the multiple metal powder materials as claimed in claim 1 , wherein each of the lifting devices in the collector container ( 16 ), the build cylinder ( 17 ) and the feed container ( 19 ) is a hydraulic lifting device, or a mechanical lifting device; the lifting devices are connected with the master control system ( 13 ).

3 . The SLM forming device for the multiple metal powder materials as claimed in claim 1 , wherein each of the heating devices ( 35 ) out of the collector container ( 16 ), the build cylinder ( 17 ) and the feed container ( 19 ) is a heating plate; a heating pipe arranged continuously in a U-shaped structure is provided in the heating plate; the insulating layers ( 36 ) are high temperature resistant aluminum silicate felts and are 20-30 mm thick; the heating pipe is connected with the master control system ( 13 ).

4 . The SLM forming device for the multiple metal powder materials as claimed in claim 1 , wherein a plurality of heating grooves ( 46 ) are provided on the substrate ( 39 ); a heating wire ( 48 ) and a second temperature measuring thermocouple ( 47 ) are provided in each of the heating grooves ( 46 ); the heating wire ( 48 ) and the second temperature measuring thermocouple ( 47 ) all are connected with the master control system ( 13 ).

5 . The SLM forming device for the multiple metal powder materials as claimed in claim 1 , wherein the leveling oil cylinders ( 40 ) are provided at four corners of the substrate ( 39 ); cylinder bodies of the leveling oil cylinders ( 40 ) are fixed on the bottom plate; piston rods are fixed on a bottom portion of the substrate ( 39 ); the leveling oil cylinders ( 40 ) are connected with the master control system ( 13 ).

6 . The SLM forming device for the multiple metal powder materials as claimed in claim 1 , wherein the stress sensor ( 23 ) under the compaction roller ( 26 ) comprises a deformation body ( 51 ), a resistance strain type sensor ( 50 ) and an Analog-to-Digital conversion circuit ( 49 ); the stress sensor ( 23 ) is connected with the master control system ( 13 ).

7 . The SLM forming device for the multiple metal powder materials as claimed in claim 1 , wherein a transparent protective cover ( 3 ) is provided outside of the electron microscope ( 4 ) and the CCD camera ( 9 ); the transparent protective cover ( 3 ) is made of a transparent quartz glass; the electron microscope ( 4 ) and the CCD camera ( 9 ) are, connected with the master control system ( 13 ).

Assignees

• Univ North China

Inventors

• Bai Peikang
• Zhao Zhanyong
• Liu Bin
• Yan Xibin
• Wang Jianhong
• Dang Jingzhi

Classifications

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title

• B22F2203/00

  Controlling · CPC title

• B23K26/342

  Build-up welding · CPC title

• B23K26/082

  Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head · CPC title

• B23K26/032

  using optical means · CPC title